11 results about "Vacuum grease" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

A heater optimized ball valve is provided that includes one or more heat flux components. A heater optimized ball valve may be a modular ball valve including a plurality of end caps secured to a valve body frame having a ball disposed within the frame between at least two of the end caps, where the modular ball valve includes a thermally conductive grease including a mixture of a vacuum grease and a metal alloy powder, the metal alloy powder being thermally conductive to the ball, and the vacuum grease being thermally conductive to the ball. And at least one seal disposed on the top outer diameter surface of the ball and on the inner proximal facing surface of the top end cap, at least partially filling a top gap separating the two surfaces, and disposed on the bottom outer diameter surface of the ball valve and on the distal facing surface of the bottom end cap, at least partially filling a gap separating the two surfaces.

The invention relates to an etching method for manufacturing a back incidence micro lens and a manufacturing method for a detector chip. The etching method for manufacturing the back incidence micro lens comprises the following steps: thinning and polishing the back surface of a wafer subjected to a front surface process; manufacturing a photoresist lens pattern of which the morphology meets the target requirement on the back surface of the thinned wafer; photoresist is spin-coated on the front surface of the wafer and baked, so that a front surface protection layer is formed on the surface of the front surface process; coating vacuum silicone grease on the surface of the front protective layer; and performing dry etching on a mask layer by using the photoresist lens pattern on the back surface of the wafer as the mask layer. According to the method, the back surface of the wafer is thinned and polished, so that the technical problems of photoresist burning, non-uniform etching and the like caused by heat accumulation can be effectively avoided; meanwhile, the vacuum silicone grease can avoid performance degradation and photoresist burning caused by overheating of the chip in the subsequent dry etching process, enables the chip to be kept at a stable position, and prevents wafer displacement from affecting the etching precision.

The present invention discloses a vacuum grease coating device for an annular sealing ring, comprising: a support and expansion assembly, an electric rotating disk and a quantitative setter; the support and expansion assembly is sleeved inside the annular sealing ring through its inner ring support and expansion mechanism to expand and fix the annular sealing ring, and the inner ring support and expansion mechanism is contracted through its outer ring contraction mechanism to disassemble and load the annular sealing ring, and is installed on the rotating end face of the electric rotating disk through its chassis, and the support and expansion assembly and the annular sealing ring are driven to rotate at a uniform speed together through the electric rotating disk; the coating brush of the quantitative setter contacts the working surface of the annular sealing ring to be greased, and is used to quantitatively squeeze vacuum grease on the annular sealing ring in a uniformly rotating state. The technical solution of the present invention solves the problem that the existing implementation method of applying vacuum grease to metal sealing rings is completely dependent on the pure manual operation of the assembler, which makes it difficult to achieve the requirements of quantitative grease application and uniform coating.

The invention provides a method for coating grease for a spatial hundred million conversion slip ring, which comprises the following steps of: S1, oiling an insulating layer: controlling the surface roughness of the insulating layer by adopting a method of soaking the insulating layer in base oil; s2, filling grease; s3, sample injection grease coating: controlling the grease surface amount by adopting volume quantification; s4, checking after coating; s5, running-in after coating: enabling the sample introduction grease to uniformly cover a slip ring loop through multiple running-in; s6, removing redundant sample introduction grease; and S7, removing redundant sample injection grease, and checking after resetting. Through a reasonable coating process and comprehensive performance detection, uniform distribution of grease is achieved, the problems that vacuum grease coating of the space slip ring is not uniform, and the electric contact performance is difficult to control are solved, the long service life and reliability of the space slip ring in the space environment are guaranteed, and the method is suitable for space slip ring products which are high in rotating speed, long in service life and high in stability.

The invention belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing and a using method.The vacuum dynamic sealing structure comprises an external powder blocking module and a dynamic sealing module, and the external powder blocking module is composed of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate; the first powder blocking plate is fixed to the top of the plasma gun body to form an arc-shaped shielding face, and the powder blocking ring is coaxially arranged on the positive electrode of the plasma gun body in a sleeving mode and forms an annular gap type powder blocking structure with the insulating powder blocking plate. The dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the invention has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The invention relates to a preparation method of ultrahigh-vacuum lubricating grease, which comprises the following steps: firstly, enabling the kinematic viscosity of perfluoropolyether (PFPE) base oil to be 150-220mm < 2 > / s at 40 DEG C, carrying out flowing film distillation under a high-vacuum condition through a polymer purifier, and carrying out dynamic, high-temperature and high-vacuum pretreatment on the perfluoropolyether base oil for four times. The low-volatility perfluoropolyether lubricating grease meets the requirement that equipment has excellent low-volatility performance under the ultrahigh vacuum condition, is better than existing vacuum-resistant perfluoropolyether lubricating grease in the market, and can achieve stable lubrication and protection performance of the equipment under the conditions that the highest temperature is 280 DEG C and the ultrahigh vacuum is 3.5 * 10 <-9 > mbar.

Provided is a heater optimized ball valve that includes one or more heat-through components. The heater optimized ball valve may be a modular ball valve that includes a plurality of end caps secured to a valve body frame with a ball disposed within the frame between at least two of the end caps, wherein the modular ball valve comprises a thermally conductive grease that includes a mixture of a vacuum grease and a metal-alloy powder disposed on a top outer-diameter surface of the ball and on an inner proximal-facing surface of a top end cap at least partially filling a top gap that separates the two surfaces, and on a bottom outer diameter surface of the ball valve and on a distal-facing surface of a bottom end cap at least partially filling a gap that separates the two surfaces.

Provided is a heater optimized ball valve that includes one or more heat-through components. The heater optimized ball valve may be a modular ball valve that includes a plurality of end caps secured to a valve body frame with a ball disposed within the frame between at least two of the end caps, wherein the modular ball valve comprises a thermally conductive grease that includes a mixture of a vacuum grease and a metal-alloy powder disposed on a top outer-diameter surface of the ball and on an inner proximal-facing surface of a top end cap at least partially filling a top gap that separates the two surfaces, and on a bottom outer diameter surface of the ball valve and on a distal-facing surface of a bottom end cap at least partially filling a gap that separates the two surfaces.

The present application belongs to the technical field of precision machinery assembly and lubrication, and specifically discloses a vacuum grease injection method for double-row hub bearing units, introduces temperature correction coefficient, grease viscosity correction coefficient and bearing structure coefficient, optimizes the calibration and calculation logic of the system volume compression coefficient, and improves the multi-dimensional correction model of the grease supplement amount; through the closed-loop control system of pressure-flow real-time feedback, intelligent identification of the double-row raceway grease injection stage, adaptive switching of the grease injection rate, and accurate detection and quantitative grease supplement of the backflow air are realized, so that the bearing internal cavity is completely, densely and bubble-free filled with lubricating grease, the lubrication reliability and long-term operation life of the hub bearing unit are greatly improved, the intelligent process system integrating monitoring, identification, control and compensation is constructed, the dependence on the experience of the operating personnel is reduced, and the process stability and replicability are improved.

The utility model relates to the technical field of gas permeability testing, and discloses a gas permeability tester, which comprises a motor fixedly connected to a bottom output shaft of an electric push rod I; the glue injection pump is in through connection with the outer side wall of the glue barrel; the scraping plate is arranged at the bottom of the output end of the glue injection pump, and the output end of the glue injection pump penetrates into the scraping plate; the glue injection opening is formed in the front side wall of the scraper, and the top of the glue injection opening is communicated with the output end of the glue injection pump. Firstly, a steering mechanism is controlled to enable a structure at the bottom of a supporting plate to rotate to the position above a lower cavity plate, a motor and a glue injection pump are started, the motor drives a bottom plate to rotate clockwise through a connecting rod, the bottom plate drives a scraping plate with the top connected with a glue barrel to slide on the lower cavity plate, and at the moment, the glue injection pump conveys vacuum grease in the glue barrel to a glue injection opening; the surface of the lower cavity plate is coated with vacuum grease through the glue injection opening, the vacuum grease is evenly coated through the moving scraping plate, and after the motor drives the scraping plate to rotate by a circle, coating of the vacuum grease on the upper surface of the lower cavity plate is completed.